Programmable control unit



FIG. 1 is a perspective view of a programmable control unit showing our new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a side elevation thereof, the other side being a mirror image;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a bottom plan view thereof. 

The ornamental design for a programmable control unit, as shown and described. 